Die-stock



UNITED STATES PATENT OFFICE.

JOEL G. JACKSON, OF MINNEAPOLIS, MINNESOTA.

DIE-STOCK. I

SPECIFICATION forming part of Iietters Patent No. 504,084, dated August29, 1893- Application filed J l 5, 1892- Serial No. 438,998- (No model.)

To aZZ whom it may concern..-

Be it known that I, JOEL G. JACKSON, of Minneapolis, in the county ofHennepin and State of Minnesota, have invented a new and ImprovedDie-Stock, of which the following is a full, clear, and exactdescription.

My invention relates to improvements in die stocks such as are used forholding thread cutting dies; and the object of my invention is toproduce a simple and durable stock which is adapted to hold the diesfirmlyin position, which is constructed so that the dies may be easilyand instantly inserted or removed, and which is provided with anaccurate adjusting mechanism by which the dies may be set to cut anydesired size of thread within reasonable limits.

To this end my invention consists in certain features of constructionand combinations of the same, as will be fully described 11 to carry thedies, end lugs or arms 12 which are hollow and screw-threaded so as toreceive suitable handles, a lower hollow cylindrical portion 13 arrangedcentrally in the stock, and a centering guide 14 held by set screws 15in the lower end of the part 13. The above construction is common to diestocks and forms no part of my invention.

On the top of the die stock and on one side is a lug 16 which has at itsinner upper edge an inwardly projecting flange 17 which is adapted tooverlap the "dies 18 and prevent them from being pushed out of placewhen the stock is used. The dies 18 are of the usual kind. On theoutside of the stock top and nearlyparallel with the lug 16 is anotherlug 19', and between this and the dies is a longitudinally and 50laterally movable wedge 20 which, by being forced between the dies andthe lug 19, holds the dies securelyin place, and the Wedge has a flange21 which overlaps the top of the dies and assists in holding them inplace. A face plate 22 is secured to the lug 19 and overlaps the wedge20, and extending downward through the face plate are broad headedscrews 23 which project through slots 24 in the wedge 20 and are screwedinto the body of the stock. These slots 24 extend nearly longitudinallyof the wedge 20, near its ends, and are parallel with the inclined sideof the wedge. The wedge is actuated by a lever 25 which swings in ahorizontal direction and is fulcrumed on a stud 26 beneath theoverhangingportion of the stock top, and this lever has a short end 27projecting beyond its fulcrum and terminating in a stud 28 which engagesthe wedge 20. It will be seen then that by throwing the free end of thelever 25 outward and forward, the wedge 20 will be moved backward andoutward, so as to free thevdies l8, and by swinging the lever into aposition nearly parallel with the arms 12, as shown in Fig. 1, the wedgewill be thrown forward and forced between the lug 19 and dies 18, thusbinding the latter firmly in place. It is obvious that this movement maybe efiiected instantly, but I do not confine myself to the precisemechanism for moving the wedge, as it'will be understood that otherequivalent means may be employed. The dies 18 are adjusted lengthwise soas to cut the right size of thread by means of the bolts 29 which arearranged at the ends of the dies and longitudinally of the dies and thedie stock, the bolts having their inner ends held to turn freely andloosely in lugs 30, as shown in Fig. 2, and their outer ends 29 squaredand held in lugs 31 so as to prevent them from turning.

Threaded upon the bolts are nuts 32, of circular cross section, thesenuts havingmilled edges to enable them to be easily turned, and the nutsare held between the lugs 30 and 31 and when turned they will cause thebolts 29 to be moved in and out. The nuts 32 are divided intoequidistant spaces by longitudinal lines 33, there being ten lines whichare numbered from 0 to 9, but this arrangement is arbitrary and anynumber of lines and numbers may be used. The lines are adapted toregister with a single longitudinal line 34.

which is produced on each of the lugs 31. The lines and nuts areadjusted so that by turning the nuts a distance of one line or space,they will advance or retract thedies 18 so as to make the desired changein the size of a thread. For instance, we will suppose that when the 0lines 33 register with the lines 34:, as in Fig. 1, the dies areadjusted to cut a standard thread and that there are twenty threads toan inch on the bolts 29, and ten spaces on the nuts 32. It will be seenthen that if the nuts are turned to 1 or 9, that is, until these partsregister with the lines 34, a thread exactly one two-hundredth of aninch over or under the standard would be out, and by this principle anyaccurate adjustment wanted may be quickly obtained.

Having thus described my inventiOl I claim as new and desire to secureby Letters Patent 1. A die stock provided with lugs 0r ribs, one ofwhich is inclined, a longitudinally and laterally movable wedge havingan inclined side engaging the inclined rib and a straight side parallelwith the other rib and adapted to clamp both dies laterally thereagainstand adjusting screws for the ends of the dies, substantially as setforth.

2, A die stock provided with lugs or ribs, one of which is inclined, aslotted wedge having an inclined side engaging the inclined rib and astraight side parallel with the adjacent face of the other rib andadapted to clamp both dies laterally thereagainst, bolts extendingthrough the wedge slots into the stock and adjusting screws for the endsof the dies, substantially as set forth.

3. A die stock having lugs or ribs upon its face, one of which isinclined in relation to the other, the ribs being adapted to hold diesbetween them, a longitudinally and laterally movable wedge held betweenthe inclinedlug and the dies, and a lever for adjusting the wedge,substantially as described.

4. A die stock having lugs or ribs upon its face adapted to hold diesbetween them, one lug being straight and having an overhanging flange onits inner side to cover the dies and the other lug being inclined, and alongitudinally and laterally movable wedge held between the inclined lugand the dies, the wedge having an overhanging flange on its inner upperedge, substantially as described.

5. A die stock having lugs upon its upper face adapted to hold diesbetween them, one lug being straight and having an overhanging flange onits inner edge and the other being inclined, a wedge held to movelongitudinally and laterally between the inclined lug and the diescarried by thestock, a face plate secured to the inclined lug andoverlapping the wedge, limiting screws extending through the face plateand into the stock body, the screws extending through hollow slots inthe wedge, and a lever for moving the wedge,substantially as described.

JOEL G. J AOKSON.

Witnesses:

L. M. RUPERT, O. G. OLNEY.

